Hand boring-machine.



N0- 829,844. PATENTED AUG. 28, 1906. J. W. GONE.

HAND BORING MACHINE.

APPLICATION FILED AUG. 26, 1905.

2 SHEETS-SHEET 1.

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UNITED STATES J 0H1 WV. CONE, OF BARNESBORO, PENNSYLVANIA.

HAND BORING-MACHINE.

Specification of Letters Patent.

Patented Aug. 28, 1906.

Application filed August 26, 1905. Serial No. 275,883.

To all whom it may concern.-

Be it known that I, JOHN IV. CONE, a citizen of the United States, and a resident of Barnesboro, in the county of Cambria and State of Pennsylvania, have invented a new and Improved Hand Boring-Machine, of which the following is a full, clear, and exact description.

This invention relates to hand boring-machines.

The object of the invention is to produce a machine of this class which is especially adapted for boring holes in joists for passing wires in electrical construction.

The invention consists in the construction and combination of parts to be more fully described hereinafter and definitely set forth in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a plan of the machine. In this view the clampinghandle is represented as broken away. Fig. 2 is a side elevation, cer tain parts being broken away, as will appear. In this view dotted lines are shown representing the position of the joists. Fig. 3 is a rear end elevation, the clamping-handle being represented as broken away. Fig. 4 is a vertical cross-section taken on the line 4 4 of Fig. 1, and Fig. 5 is a plan of a bracket which constitutes a feature of the invention.

Referring more particularly to the parts, 1 represents a frame of substantially rectangular form constructed of parallel side bars 2 and transverse end bars 3 and 4. The end bar 4 has its extremities turned up, as indicated most clearly in Fig. 3, and bent out, as indicated in Fig. 2, so as to form pointed spurs or dogs 5, adapted to engage the vertical face 6 of a joist beneath the floor. Adj acent to the rear transverse bar 3 of the frame I provide an auxiliary transverse bar 7,which is riveted rigidly to the upper faces of the bars 2. Lying against the inner edge of the left side bar 2 I provide a clamping-bar 8, the rear extremity thereof being bent upwardly and rearwardly, so as to form a main dog or spur 9, somewhat similar to the spurs 5 referred to above. It should be understood that this bar 8 moves rearwardly in the operation of clamping the frame in position, sliding across the upper face of the bar 3 and across the under face of the bar 7. In this way the bars 3 and 7 operate as guides'for the bar 8, as will be readily understood. The forward extremity of the bar 8 is attached to a slide 10, the construction of which is most clearly shown in Fig. 4. It comprises a-body 11, which is bent so as to form a rudimentary socket 12, receiving the extremity of the bar 8, as shown. The lower portion of this body 11' is extended beyond the outer edge of the adjacent side bar 2 and is bent upwardly, so as to form a nib 13 at its point which lies against its edge, as indicated. The upper portion of the slide is extended across the principal portion of the side bar 2 and is there bent upwardly, so as to form an car 14. To 7 this ea-r 14 there is attached a connecting-rod 15, which extends longitudinally of the frame as shown most clearly in Fig. 1, and is pivotally attached at 16 to a lever 17. This lever 17 is preferably a bent lever, as indicated in 7 Fig. 3, having its fulcrum at 18, where it is attached to an ear 19, formed by bending down the extremity of the crossbar 3. At its extremity the lever 17 is provided with a suitable handle 20, which enables the same to be operated with facility.

To the under side of the cross-bars 3 and 4 guide-brackets 21 are attached, as shown in Fig. 2. On these brackets a main guide-bar 22 is slidably mounted. Near one extremity 8 this guide-bar 22 is provided with a handle 23, projecting downwardly, as indicated in Fig. 2. At a suitable point on the main guidebar 22 a bracket 24 is attached, said bracket being provided with a socket or opening 25, through which the guide-bar passes, as indicated most clearly in Fig. 4. By means of a set-screw 26 the bracket 24 may be bolted in any desired adjusted position upon the guide-bar, as will be readily understood. The construction of this bracket 24 is most clearly shown in Fig. 5. It comprises a body having substantially the form of a block and having a vertical bore 27. At one end this bracket is split, as shown at 28, and provided 1 with oppositely-disposed cars 29, through which a clamping-bolt 30 passes, as shown.

Referring especially to Fig. 4, I mount in the bore 27a vertically-adjustable sleeve 31. This sleeve may be clamped at any height desired by means of the clamping-bolt 30, just referred to. In the bore of this sleeve 31 there is rotatably mounted a spindle 32, the lower extremity whereof is enlarged to form a hub 33, in which a crank 34 is adjustr ably attached by means of a set-screw 35, as indicated most clearly in Fig. 3. In this conis formed into a spider or housing 38,inwhich. there is received a bevel gear-wheel 39, the

same being rigidly attached to the aforesaid spindle 32. The upper portion of the housing 38 is formed. into a bearing 40, having a horizontal axis, and in the bore of this bearing a stub-shaft 41 is rotatably mounted, saidshaft carrying rigidly a bevel gear-wheel 42, which meshes with the aforesaid bevel gearwheel 39. Beyond the bevel-gear 42 the stub-shaft 41 is formed into a chuck 43, adapted to receive a bit or similar boringtool 44, the same being secured in the chuck by means of a set-screw 45, as indicated in Fig. 1. The bearing 40 is preferably split, as indicated at 46 in Fig. 4, so as to present ears 47 connected by clamp-bolts 48.

In using the device in practice the frame 1 will be held in position between two adjacent joists, (indicated by the dotted lines at 49 and 50.) I/Vith the frame 1 held in a horizontalplane the handle 20 is forced downwardly, so as tothrow the point of attachment 16 of the lever 17 toward the rear. In this way the connecting-rod 15 is actuated so as to force the main clamping-bar 8 in a rearward direction. In this way the point of the main spur ordog 9 is forced into the vertical face of the joist 50, and the spurs 5 are likewise forced into the vertical face 6 of the joist 49. Having applied the tool 44 in the chuck 4 3, the height of the tool will be adjusted by adjusting the sleeve 31 vertically and clamping the same by means of the bolt 30, as will be readily understood. By means of the handle 23 the main guide-bar 22 is then advanced so as to bring the point of the tool against the joist to be bored. Holding the tool in this claim as new and desire to secure by Letters Patent- 1. In a boring-machine, in combination, a frame, means carried thereby for supporting the samebetween two vertical faces, a bracket, means for guiding the same on said frame, a vertically-adjustable sleeve mounted in said'bracket, a spindle rotatably mountedin said sleeve, a stub-shaft supported on said bracket and adapted to receive a boringtool, bevel-gears for driving said shaft from said spindle, and means for driving said spindle.

2. In a boring-machine in combination, a frame having spurs rigid therewith and an extensible spur opposite said first spurs, a guide bar slidably mounted longitudinally of said frame, a bracket attached to said guide bar, a sleeve vertically adjustable in said bracket, a spindle rotatably mounted in said sleeve and having a crank rigid therewith, a chuck adapted to support a tool and having an axis of rotation substantially at right angles to the axis of said spindle, and gear-wheels connecting said spindle with said chuck.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN W. CONE.

Witnesses:

JAs. O. PATTERSON, SAMUEL D. THOMAS. 

